The UX4-D4 is a modular power supply chassis from Advanced Energy's UltiMod series, delivering up to 600 W of output power with user and field-configurable architecture. It features four slots for interchangeable powerMod modules, enabling flexible output voltage and current configurations ranging from 2.5 V to 48 V. The unit achieves up to 91% efficiency at 230 VAC input, operates across a wide temperature range from -40°C to +70°C, and includes standard medical-grade features such as 4 kV input-to-output isolation, leakage current below 300 µA (or 150 µA with optional low-leakage configuration), and 2 MOPP safety rating. The UX4-D4 is ideal for medical diagnostic equipment, industrial test and measurement systems, and telecommunications applications requiring reliable, compact, and configurable power delivery with minimal acoustic noise and no minimum load requirement.